Prince George's Audubon Society

NEXT PROGRAMTuesday, May 10 2016 at 7:30 pm at the College Park Aviation Museum

The 2015 Breeding Bird Survey at the Patuxent Research Refuge How it was done and what it found

presented by John Sauer

The Patuxent Research Refuge, at 13,000 acres, contains a variety of habitats, ranging from bottomlands along the Patuxent River to upland pine forests, to swamps and upland hardwoods.  The refuge has a long history of bird studies, which are facilitated by a system of grid markers, installed over most of the refuge in the 1940s, that forms a convenient framework for long-term studies.  In 2008, Dr John Sauer organized a bird survey around the grid system, visiting grid markers 400m apart and conducting bird counts during breeding season.  These counts were used to map bird distributions on the refuge, and to develop statistical models to evaluate the effects of management activities on bird populations.  In 2015, the survey was repeated to analyze changes in bird populations over the previous seven years. 

This talk will focus on the joys and tribulations of organizing and conducting a bird survey.

Visit the Programs page for more information and directions

Please visit the Newsletter page to see the latest issue of The Bluebird

and follow us on social media:


Welcome to the home page of the Prince George's Audubon Society (PGAS), a local chapter of the National Audubon Society serving Audubon members in the northern part of Prince George's County, Maryland.  PGAS was established in 1972 as a non-profit organization with officers and a board of directors, all volunteers, elected by the general membership.  Membership in PGAS is obtained through the National Audubon Society.  PGAS members receive our chaper newsletter, The Bluebird, and are encouraged to actively participate in chapter activities including a monthly speaker series, field trips, annual bird counts, and other special events. 

This website is for members of PGAS to keep up to date on program and field trip schedules and other chapter activities.  In addition, this website serves as a resource for non-members to find out more about Audubon and PGAS and to explore the benefits of membership.  Non-members are welcome to participate in our meetings and field trips and are free to take advantage of the local birding and environmental information on this website as well as the links to a wide range of related information available on the internet.  Of course, if you live in northern Prince George's County we would love to have you as a PGAS member, and membership information is always available.


Questions or comments?  Contact the PGAS Webmaster at:

  P.O. Box 1311, Bowie, MD 20718-1311

last updated 5/14/2015